293 lines
10 KiB
C++
293 lines
10 KiB
C++
#ifndef EntityFile_h__
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#define EntityFile_h__
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#include <stack>
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#include <boost/lexical_cast.hpp>
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#include <xercesc/util/XercesDefs.hpp>
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#include <xercesc/util/PlatformUtils.hpp>
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#include <xercesc/sax2/SAX2XMLReader.hpp>
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#include <xercesc/sax2/XMLReaderFactory.hpp>
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#include <xercesc/sax2/DefaultHandler.hpp>
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#include <xercesc/sax2/Attributes.hpp>
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#include <xercesc/util/XMLString.hpp>
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#include <xercesc/util/XMLChar.hpp>
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#include <xercesc/sax2/DefaultHandler.hpp>
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#include <xercesc/framework/XMLDocumentHandler.hpp>
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#include <xercesc/framework/psvi/XSElementDeclaration.hpp>
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#include <xercesc/framework/psvi/XSComplexTypeDefinition.hpp>
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#include <xercesc/framework/psvi/XSParticle.hpp>
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#include <xercesc/framework/psvi/XSModelGroup.hpp>
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#include <xercesc/framework/psvi/XSAnnotation.hpp>
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#include <xercesc/framework/psvi/XSValue.hpp>
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#include <xercesc/framework/XMLGrammarPoolImpl.hpp>
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#include <xercesc/dom/DOM.hpp>
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#include <xercesc/dom/DOMLSInput.hpp>
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#include <xercesc/dom/DOMElement.hpp>
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#include "../GLM.h"
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#include "Util/XercesString.h"
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#include "ResourceManager.h"
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#include "Entity.h"
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#include "ComponentInfo.h"
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class EntityFileHandler
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{
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friend class EntityFileSAXHandler;
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public:
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// @param EntityID The entity found
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// @param EntityID The parent of the entity
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typedef std::function<void(EntityID, EntityID)> OnStartEntityCallback;
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void SetStartEntityCallback(OnStartEntityCallback c) { m_OnStartEntityCallback = c; }
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// @param EntityID The entity the component corresponds to
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// @param std::string Type name of the component
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typedef std::function<void(EntityID, std::string)> OnStartComponentCallback;
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void SetStartComponentCallback(OnStartComponentCallback c) { m_OnStartComponentCallback = c; }
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// @param EntityID Entity
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// @param std::string Component name
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// @param std::string Field name
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// @param std::map<std::string, std::string> Field attribute names and values
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typedef std::function<void(EntityID, std::string, std::string, std::map<std::string, std::string>)> OnStartFieldCallback;
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void SetStartFieldCallback(OnStartFieldCallback c) { m_OnStartFieldCallback = c; }
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// @param EntityID Entity
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// @param std::string Component name
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// @param std::string Field name
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// @param char* Field data
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typedef std::function<void(EntityID, std::string, std::string, const char*)> OnStartFieldDataCallback;
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void SetStartFieldDataCallback(OnStartFieldDataCallback c) { m_OnStartFieldDataCallback = c; }
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private:
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OnStartEntityCallback m_OnStartEntityCallback = nullptr;
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OnStartComponentCallback m_OnStartComponentCallback = nullptr;
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OnStartFieldCallback m_OnStartFieldCallback = nullptr;
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OnStartFieldDataCallback m_OnStartFieldDataCallback = nullptr;
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};
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class EntityFileSAXHandler : public xercesc::DefaultHandler
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{
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public:
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enum class State
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{
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Unknown,
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Entity,
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Component,
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ComponentField
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};
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EntityFileSAXHandler(const EntityFileHandler* handler, xercesc::SAX2XMLReader* reader)
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: m_Handler(handler)
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, m_Reader(reader)
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{
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// 0 is imaginary world entity
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m_EntityStack.push(0);
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m_StateStack.push(State::Unknown);
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}
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void startElement(const XMLCh* const _uri, const XMLCh* const _localName, const XMLCh* const _qname, const xercesc::Attributes& attrs) override
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{
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std::string name = XS::ToString(_localName);
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if (m_StateStack.top() == State::Unknown || m_StateStack.top() == State::Entity) {
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if (name == "Entity") {
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m_StateStack.push(State::Entity);
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onStartEntity(attrs);
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return;
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}
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if (name == "EntityRef") {
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onStartEntityRef(attrs);
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return;
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}
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}
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std::string uri = XS::ToString(_uri);
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if (m_StateStack.top() == State::Entity) {
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if (uri == "components") {
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m_StateStack.push(State::Component);
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onStartComponent(name);
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return;
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}
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}
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if (m_StateStack.top() == State::Component) {
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m_StateStack.push(State::ComponentField);
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onStartComponentField(name, attrs);
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return;
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}
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}
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void characters(const XMLCh* const chars, const XMLSize_t length) override
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{
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if (m_StateStack.top() == State::ComponentField) {
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char* transcoded = xercesc::XMLString::transcode(chars);
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onFieldData(transcoded);
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}
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}
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void endElement(const XMLCh* const _uri, const XMLCh* const _localName, const XMLCh* const _qname) override
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{
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std::string name = XS::ToString(_localName);
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if (m_StateStack.top() == State::Entity) {
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if (name == "Entity") {
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m_StateStack.pop();
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onEndEntity();
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return;
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}
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}
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std::string uri = XS::ToString(_uri);
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if (m_StateStack.top() == State::Component) {
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//if (uri == "components") {
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m_StateStack.pop();
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onEndComponent(name);
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return;
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//}
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}
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if (m_StateStack.top() == State::ComponentField) {
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m_StateStack.pop();
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onEndComponentField(name);
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return;
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}
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}
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void fatalError(const xercesc::SAXParseException& e)
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{
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XS::ToString s(e.getMessage());
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LOG_ERROR("SAXParseException: %s", ((std::string)s).c_str());
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//throw e;
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}
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private:
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const EntityFileHandler* m_Handler;
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xercesc::XMLGrammarPool* m_GrammarPool;
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xercesc::SAX2XMLReader* m_Reader;
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//State m_CurrentScope = State::Unknown;
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std::stack<State> m_StateStack;
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unsigned int m_NextEntityID = 1;
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std::stack<EntityID> m_EntityStack;
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std::string m_CurrentComponent;
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std::string m_CurrentField;
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std::map<std::string, std::string> m_CurrentAttributes;
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void onStartEntity(const xercesc::Attributes& attrs)
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{
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EntityID parent = m_EntityStack.top();
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// TODO: Create entity here
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auto xName = attrs.getValue(XS::ToXMLCh("name"));
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std::string name = XS::ToString(xName);
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//LOG_DEBUG("Entity %i (%i): %s", m_NextEntityID, parent, name.c_str());
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if (m_Handler->m_OnStartEntityCallback) {
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m_Handler->m_OnStartEntityCallback(m_NextEntityID, parent);
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}
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m_EntityStack.push(m_NextEntityID);
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m_NextEntityID++;
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}
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void onEndEntity()
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{
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m_EntityStack.pop();
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}
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void onStartEntityRef(const xercesc::Attributes& attrs)
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{
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std::string path = XS::ToString(attrs.getValue(XS::ToXMLCh("file")));
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xercesc::SAX2XMLReader* parser = xercesc::XMLReaderFactory::createXMLReader();
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parser->setContentHandler(this);
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parser->setErrorHandler(this);
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parser->parse(path.c_str());
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delete parser;
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}
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void onStartComponent(std::string name)
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{
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//LOG_DEBUG(" Component: %s", name.c_str());
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m_CurrentComponent = name;
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if (m_Handler->m_OnStartComponentCallback) {
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m_Handler->m_OnStartComponentCallback(m_EntityStack.top(), name);
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}
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}
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void onEndComponent(std::string name) { }
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void onStartComponentField(std::string field, const xercesc::Attributes& attrs)
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{
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//LOG_DEBUG(" Field: %s", field.c_str());
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m_CurrentField = field;
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m_CurrentAttributes.clear();
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for (int i = 0; i < attrs.getLength(); i++) {
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auto name = attrs.getQName(i);
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auto value = attrs.getValue(name);
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//LOG_DEBUG(" %s = %s", (char*)XS::ToString(name), (char*)XS::ToString(value));
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m_CurrentAttributes[XS::ToString(name).operator std::string()] = XS::ToString(value).operator std::string();
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}
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if (m_Handler->m_OnStartFieldCallback) {
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m_Handler->m_OnStartFieldCallback(m_EntityStack.top(), m_CurrentComponent, field, m_CurrentAttributes);
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}
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}
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void onEndComponentField(std::string field) { }
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void onFieldData(char* data)
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{
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//LOG_DEBUG(" Data: %s", data);
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if (m_Handler->m_OnStartFieldDataCallback) {
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m_Handler->m_OnStartFieldDataCallback(m_EntityStack.top(), m_CurrentComponent, m_CurrentField, data);
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}
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xercesc::XMLString::release(&data);
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}
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};
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class EntityFileXMLErrorHandler : public xercesc::ErrorHandler
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{
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public:
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void warning(const xercesc::SAXParseException& e) override
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{
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reportParseException("Warning", e);
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}
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void error(const xercesc::SAXParseException& e) override
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{
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reportParseException("Error", e);
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}
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void fatalError(const xercesc::SAXParseException& e) override
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{
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reportParseException("FATAL ERROR", e);
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}
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void resetErrors() override { }
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private:
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void reportParseException(std::string type, const xercesc::SAXParseException& e)
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{
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char* message = xercesc::XMLString::transcode(e.getMessage());
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char* systemID = xercesc::XMLString::transcode(e.getSystemId());
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std::cerr << systemID << ":" << e.getLineNumber() << ":" << e.getColumnNumber() << std::endl;
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std::cerr << type << ": " << message << std::endl;
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xercesc::XMLString::release(&systemID);
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xercesc::XMLString::release(&message);
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}
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};
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class EntityFile : public Resource
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{
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friend class ResourceManager;
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private:
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EntityFile(boost::filesystem::path path);
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~EntityFile();
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public:
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static std::size_t GetTypeStride(std::string typeName);
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static void WriteAttributeData(char* outData, const std::string fieldType, const std::map<std::string, std::string>& attributes);
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static void WriteValueData(char* outData, const std::string fieldType, const char* valueData);
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xercesc::XMLGrammarPool* GrammarPool() const { return m_GrammarPool; }
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void Parse(const EntityFileHandler* handler) const;
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private:
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boost::filesystem::path m_FilePath;
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xercesc::XMLGrammarPool* m_GrammarPool;
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xercesc::SAX2XMLReader* m_SAX2XMLReader;
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//std::map<std::string, ::ComponentInfo> m_ComponentInfo;
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//std::vector<std::string> m_EntityReferences;
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};
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#endif |